Hi Minas
Dne 11. 10. 19 v 9:45 Minas Harutyunyan napsal(a):
> Hi Pavel,
> 
>>
> Could you please send regdump and debug log for failing case.
> 

Thanks a lot for your reply.

Attaching regdump-960bytes.txt for 32kHz/16b/15ch both playback and 
capture,  bInterval=4 in 
https://github.com/torvalds/linux/blob/master/drivers/usb/gadget/function/f_uac2.c#L287 
=> 960 bytes packet size every 1ms. This mode does not work for EP OUT 
(host playback -> gadget -> RPi capture)

Also attaching regdmp-896bytes.txt for 32kHz/16b/14ch which works OK, 
bitperfect transmission.


For debug - I enabled this:

file gadget.c +p;file u_audio.c +p; file f_uac2.h +p

debug-960bytes.txt - not working:
Every 8 packets:

[ 2037.700760] dwc2 fe980000.usb: dwc2_hsotg_epint: ep1(out) 
DxEPINT=0x00000002
[ 2037.700765] dwc2 fe980000.usb: dwc2_gadget_handle_ep_disabled: EPDisbld
[ 2037.700773] dwc2 fe980000.usb: complete: ep ba4d666f ep1out, req 
c55e9e44, -61 => 28ac9e7b
[ 2037.700780] u_audio_iso_complete: iso_complete status(-61) 0/960




debug-896bytes.txt - working OK:

EPDisbld is not every 8 packets, sometimes I see:

  2298.501983] dwc2 fe980000.usb: dwc2_hsotg_epint: ep1(out) 
DxEPINT=0x00000002
[ 2298.501996] dwc2 fe980000.usb: complete: ep 76ae3eae ep1out, req 
6bae385d, -61 => 8ea32601
[ 2298.502001] u_audio_iso_complete: iso_complete status(-61) 0/896
[ 2298.502009] dwc2 fe980000.usb: ep1out: req 6bae385d: 896@68e9d579, 
noi=0, zero=0, snok=0

Thank you for your help.

Best regards,

Pavel.